Damper.



J. W. BLOOD.

DAMPBR.

APPLICATION FILED 00T.14, 1912. 1,065,023, Patented June 17, 1913.

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DAMPER.

Application led October 14, 1912.

To all whom t may concern.'

Be it known that I, JOSEPH. W'. BLOOD, a citizen of the United States,resident of Minneapolis, I-Iennepin county, Minnesota, have inventedcertain new and useful Improvements in Dampers, of which the followingis a specification.

My invention relates to dampers designed for use particularly inconnection with smoke flues, though capable of use wherever it isdesired to regulate the flow of currents of air through a pipe, and theobject of the invention is to provide a damper which can be easily andquickly adjusted and will eiectually control the draft in the pipe.

A further object is to provide a damper of simple construction and onewhich can be easily and quickly applied to a pipe.

The invention consists generally in various constructions andcombinations, all as hereinafter described and particularly point ed outin the claims.

In the accompanying drawings forming a part of this specification,Figure 1 is an elevation of a section of pipe, showing my inventionapplied thereto, the wall of the pipe being broken away to illustratethe position of the damper therein, Fig. 2 is a detail sectional viewshowing the mechanism for controlling the movement of the damper, Fig. 3is a horizontal sectional view through the damper-controlling mechanism.

In the drawing, 2 represents a section of pipe in which the damper ismounted. The damper preferably consists of wings 3 and 4, substantiallysemi-circular in form, provided with spindles 5 and 6 arranged side byside and journaled at their ends in the walls of the pipe or flue, or ina frame which may be inserted into the flue. The ends of these spindlesproject out beyond the pipe on one side. Upon these projecting ends arms7 and 8 are secured, one of said arms being preferably provided with acurved slot to receive the projecting spindle of the other damper wing.The projecting ends of the spindles are preferably provided with locknuts for convenience in fastening the arms thereon. Beneath the spindlesand secured to the walls of the pipe or flue is a bracket 11 havinginwardly turned ends bearing on the pipe and a middle portion that isspaced from the pipe walls to form a guide for the slide 12. This slideis piv otally connected by links 13 with the ends Specification ofLetters Patent.

Patented J une 17, 1913.

Serial No. 725,609.

of the arms 7 and 8. The slide has a vertical movement on the bracket 11and stops le and 15 are preferably provided on the bracket, one on eachside of the slide, each stop having a thumb screw 16 to engage thebracket and lock the stop in any desired p0- sition thereon. Theposition of these stops on the bracket regulates the travel of the slideand the movement of the damper wings. The wings are adapted to hang bygravity in an inclined position when the fiue is not in use but willswing outwardly, away from one another, to partially close the pipe whenthe draft is sufficient therethrough to lift the wings. Evidently, thestronger the draft the greater the movement of the wings toward ahorizontal position. As the draft increases, the damper wings or bladeswill swing outwardly automatically to check the currents iiowing throughthe flue, and as the draft decreases, the wings will drop down to aninclined position and expose a larger opening through the flue for thepassage of the products of combustion. I do not confine myself toanyparticular position or degree of inclination of the damper blades inthe flue, as the travel of the blades and their position when open maybe varied to suit different requirements.

By means of the stops I am able to regulate the movement of the slideand the travel of the damper wings, allowing them to swing partiallyopen or partially closed, as desired. I prefer also to provide a hook 17on 'the slide on which counter-balance weights 18 may be suspended forthe purpose of balancing the weight of the damper wings, to vary theirposition to suit the draft. The counter-balance is entirely independentof the stops and may be changed to suit the different draft conditions.By means of the stops I am able to regulate the movement of the wings orblades. By moving the stops up against the slide, the damper wings maybe locked in any desired position and by separating the stops a full ora partial movement of the wings is permitted.

In various ways the details of construction herein set forth may bemodified without departing from the spirit of my invention,

I claim as my invention 1. A damper comprising blades or wings, parallelspindles whereon said blades are mounted,l arms mounted on the outeradjacent ends of said spindles, each of said arms having a transverseslot therein near its spindle to receive the projecting end of the otherspindle, a guide disposed at right angles substantially to saidspindles, a slide onsaid guide, links connecting said slide With theouter portions of said arms, and

means :for regulating the travel of said slide on said guide.

2. The-combination, with a flue, of parallel. spindles journaledtherein, damper bladesmounted on; said spindles, said spindlesprojectingbeyond said iue, arms secured.; on said spindles, aguide bar secured tosaidl flue aty rightI angles substantially to said\spindlesaslide-mounted on said guide, adjustable `stops carried by said guideabove and belowy said slide for regulating the movement., off said.slide, and linkspivotally connectingsaid slide with the outerportions ofsaid arms.

3. The combination, With a pipe, of damper spindles ournaled therein,blades carried by said spindles, arms secured to the projecting ends ofsaid spindles, a guide bar secured to said pipe and extending verticallyIn witness whereof, I have hereunto'set my hand this 9th day ofOctober', 1912.

JOSEPH WV. BLOGD. litnesses GENEVIEVE E. SORENSEN, EDWARD A. PAUL..

Copesofths; patent may be obtained forrve cents each, by addressing theCommissioner oflatents, Washington, D. C.

